What does code P1170 mean on Mazda vehicles?
The oxygen sensor signal on bank 1 sensor 1 is fixed and not varying in response to air-fuel mixture changes.
OBD-II Code Mazda
P1170 — Mazda — HO2S Bank 1 Sensor 1 Circuit Fixed (Bank 1 Sensor 1)
The oxygen sensor signal on bank 1 sensor 1 is fixed and not varying in response to air-fuel mixture changes.
Common symptoms
- Check engine light
- emissions failure
Possible causes
- Failed oxygen sensor
- internal sensor fault
Initial recommendation
Replace oxygen sensor and verify proper signal switching.
Safety notice
This information is for guidance only. Brand-specific codes may vary by model, year, engine, transmission and vehicle configuration. It does not replace a physical inspection or diagnosis by a qualified mechanic. If the vehicle is unsafe to operate, avoid driving it and seek professional inspection.
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